What is the primary method to increase the difficulty of a move on the Reformer?

The primary method to increase the difficulty of a move on the Reformer is by adding more resistance. By increasing the resistance, the body has to work harder to complete the movements, thereby enhancing strength, control, and endurance. This adjustment challenges the muscles more significantly, making the exercise more demanding.

Changing the grip or increasing the number of repetitions can influence the intensity of the workout, but they do not directly correlate with the difficulty of a single movement in the same way that adjusting resistance does. Adding lighter resistance, conversely, would make the exercise easier, which does not align with the goal of increasing difficulty. Therefore, enhancing resistance on the Reformer is the most effective method for raising the level of challenge during Pilates training.